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March 28, 2017

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Fresh Grapes contain 80 percent water by weight and 20 percent juice, whereas dried grapes contain 15 percent water by weight with the rest juice. How many punds of dried grapes are needed to yield the same amount of juice as 34 pounds of fresh grapes?

  • math - ,

    34lbs*(.2)=6.8lbs of juice from the fresh grapes.

    let x=# of pounds of dried grapes needed

    We know dried grapes are 85 percent juice (.85). We also know we want 6.8lbs of juice.

    .85x=6.8

    solve for x

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